Machine tool

Abstract

A machine tool for grinding or cutting blade crests and rake faces both in the shank and in the hemispherical portion of an end mill having a hemispherical end. The movement of a work table is interlocked by a first linkage with a device for revolving a workpiece on its axis. The swiveling movement of a swivel slide is interlocked by a second linkage with the device for revolving the work.

What I claim is: 
     
       1. A machine tool comprising a workpiece supporting spindle rotatable about its own axis, a wire wound around said workpiece supporting spindle, a wire support to which the opposite ends of said wire are secured, a roller mounted on said wire support, a guide having a longitudinal groove along which said roller is movable, a cradle on which said guide is mounted for continuous rotation to a desired angle, said cradle being slidable parallel to said spindle axis, a tool rest for supporting a tool for grinding a workpiece, a swivel slide on which said tool rest is mounted, said swivel slide being pivotable around a pivot axis which extends through the axis of said workpiece supporting spindle, and a linkage connecting said swivel slide and said cradle and translating the swivelling movement of said swivel slide to straight-line sliding motion of said cradle in the direction parallel to the axis of said workpiece supporting spindle. 
     
     
       2. A machine tool as claimed in claim 1 in which said linkage includes means for continuously smoothly varying the degree of rotation of said swivel slide translated into the straight-line sliding motion. 
     
     
       3. A machine tool as claimed in claim 2 in which said means comprises a revolving member having an arm thereon linked eccentrically to said swivel slide, and adjusting member movable diametrically of said revolving member and to which the remainder of said linkage to said cradle is connected, and adjusting means connected to said adjusting member for continuously smoothly adjusting the diametrical position of said adjusting member.